On 5/28/2014 12:46 PM, Kevin A. McGrail wrote:
On 5/28/2014 12:44 PM, Arthur Glennie wrote:Specific to spamassassin, are capture groups ever useful, or should I always use non-capture groups? Eg. (lit) vs. (?:lit)I believe ?: will always be ever so slightly more efficient.
He's asking if there is ever a reason to /not/ use ?:
I believe the only use would be backrefs, which are extremely situational.